Sealed package and parts thereof



June' 18, 1935. M. H. RANEY 2,005,349

SEALED PACKAGE AND PARTS THEREOF' y Filed Jan. 4, 1933 INVENTOR-/yarw/zmzqy UNITED ys'ra'riis PATENT o-Frica Marion H. Rainey,`Flushing, N. Y., assignor to Anchor lllitpr & Closure Corporation, Longf Island City, N. Y., a corporation of New York Application January 4,1933, Serial No. 650,081 l 19 claims'. (c1. ais-se) The presentinvention relates to sealed pack- .a `sealing, disc treated `togradually release the ages, and .more particularly to an improvedpressure within a container, .without permittingA package and the partsthereof adapted to release entrance of air into the packa'sey excesspressure therein. Another object of the invention is to pro'- 5 Certainproducts, such asveiervescent salts, vide a lpair of sealing discsadaptedto seal a 5 when sealed, tend to create a pressure within thecontainer against incomingmoisture and adeptpackage. This is due to thefact that the lsalts ed to vent excessive pressure within the packcannotbe completely dehydrated before they age, without impairing theeffectiveness of the are sealed and necessarily contain water of crys-Seal.

l tallization which, upon slight decomposition of AnOther Object iS t0provide sealing means 10v the salt, causes effervescence. As a result,the Particularly adapted to be used in connection product withinthetpackage creates a substantial With existing typeS 0i' Closure eene.l pressure. Upon opening thel package', due to A further object of theinvention is to provide the excessive pressure, a part of the product isan improved closure and/:package particularly likely to be blown out ofthe container, causing useful for products likely lte generate Presente1:5

the purchaser to think that something is wrong within-the package. t

with the product. In other instances, caps may Other andfurther objectsof the invention be forced out of proper sealing position by ex- Will beObviousupon an understanding' of the cessive 4internal pressure and failto seal the illustrated embodiment about to be described, packagethereafter against incoming moisture. 01 Will be indicated in theappended Claims, and 2o' As a, result, the moisture within theatmosphere various .advantages not Yreferred to herein will causesfurther decomposition' of the sali; and occur to one skilled in the artfupon employment may spoil the entire contents of the package. 0f theinVentiOn in Praetiee- 'I'he above contingencies are very objectionable,A plfeferled' embodiment 0i' the invention` hasl as since they createdissatisfaction on the part or been theseh'for purposes of illustrationand de*v 25 the consumerand often cause serious accidents, SGriPtiOn andiS ShOWn in the accompanying due to the excessive pressure createdwithin the drawing. forming n part 0f' the Speeiiieetien, packages.wherein 'I'he use of ordinary screw caps with the usual Fig- 1 iS eSeCtiOnal View illustrating e Dreliners has not been satisfactory forthe reasons ferfed impediment 0f the Present inventiOn: 30 noted above.Attempts have been made hereto- Fig- 2 1Sv an enlarged-fragmentarySectional fore to provide a package which would relieve Viewillustrating Pressure being relieved by the the pressure in a container,but such attempts Sealing means;

- have resulted in an inferior seal, which permit- F18. 3 is a sectional,View illustrating asslishtly ood the product to deteriorate, or in a'sealV im, different embodiment of the present invention; a5 en tpensiveto be practical. In most cases, the and U o cost was increased greatlyand the sealing eiil- F18- 4 1S' en 'enlarged fragmentaryr sectionaloiency decreased greatm view illustrating another embodiment -of `the vThe present invention aims to overcomefthe Present nVentiOn- 4 abovedimculties by providing a simple, inexpen- Referring again t0 thedrawing. ndmore par- 40 sive sealing means adapted to be used inconticularly t0 FS- 1 there 1S Shown a Cntainell nection with standardtypes of caps and conhaving suitable screw threads or lugs 2 at sublfamem In this way, an improved package stantially the upper end thereofadapted to coop. t adapted to prevent pressures therein is provided,crate with Screw lugs .0n a cli-'mire cap Pref' without materiallyincreasing the cost lthereof erably he containr iSmade 0f glas'andiima45 and without impairing the sealing emciency. vided Wlth any desirablethread' niS/h, such as: An object of the invention is to provide an nContinuOnS thread 01 en interrupted thread inexpensive sealing meansadapted Ito vent a However, it has been found desirable t0 utilizepackage when pressure accumulates therein. interrupted threads 0r lne',projections-I having- 5 Another object of l the inventionv is to,v proaninclined surface 2a merging into a subston.; 50

vide a sealed package adapted to `gradually tially straightvhorizontalsurface 2b lhaving a relieve excessive pressures in a package and .tostop portion attheiend thereof. retain sumcient pressure to prevententranceof The container may be sealed by a closure cap air into thepackage. y I having a cover portion 5 andfa kdepending Another object ofthe invention is 'to provide skirt 6,- having its .lower-edgerolled intoa wire 55 edge or bead 1 to conceal the raw edge of the metal. Suitableprojections 9 are formed from the wire edge 1, which are adapted toengage the threads 2. If desired, suitable corrugations I may beprovided in the skirt 6 to facilitate gripping of the cap duringapplication and removal thereof. While the present closure is shownconstructed of metal, in some instances it may be desirable to form theclosure cap of moldable material adapted to embody artistic designs andcolors which enhance the appearance of the package.

To carry out the objects of the present invention, a suitable sealingliner II is placed within the skirt of the cap so that it fits above themouth of the container. Preferably, this liner is made of material suchas oil paper, "Cellophane, or the like, which is impervious to moistureand air pressure, so that the liner may provide an air-tight seal at therim of the container. In order to relieve pressure within the package,an aperture I2, of suitable size, is provided in the liner II and anypressure generated by the product will pass through the aperture I2.Above and adjacent to the liner II. a disc I4, of less effective sealingmaterial, is provided. Preferably, the disc I4 is formed of cardboard,pulp board or other substantially compressible material, so that it actsas a cushion between the cap and the liner II to hold the latterresiliently against the rim of the container and to conform to anyirregularities in the rim of the container. Preferably, the disc I4 issubstantially impervious to moisture but is sufilciently porous torelieve any substantial pressure within the container. While goodresults may be obtained in this manner, it has been found that betterresults are obtained by partially impregnating or coating the disc I4with moisture resisting material, such as parailine. Preferably, thedisc I4 is subjected to a bath of molten parailine until it has absorbedfrom ilve to fifteen per cent of the paraillne. This percentage ofparafline is based upon the increased weight of the disc after theparaiilne has been applied thereto. It has been found that cardboard andthe like, when subjected to a paraiilne bath, is sufiiciently porous torelieve the pressure but is resistant to the entry of air and moisture.In this manner, any substantial pressure within the package may berelieved through the aperture I2 and through the disc I4. At the sametime, incoming air and moisture will not pass through the liner I4. Ithas been found that paramne produces a surface coating on the liner I4substantially impervious to gases and also causes the members Il and I4to adhere more or less to each other so that gases, in escaping from thecontainer, have to pass through disc I4 from the aperture I2 to the edgeof the disc, as shown more particularly in Fig. 2. Likewise, any air ormoisture, to enter the container, must permeate to the center of thedisc I4 to reach the interior of the container. The paramne coating onthe liner I4, together with the apertured disc II, have been found to beeffective in sealing the package against entry of air and moisture,which is important. If desirable, the liner II may be bonded to the discI4 with any suitable adhesive.

By utilizing interrupted threads 9, another advantageous result isattained. The angular, in-

clined portions serve to draw the cap downwardly into vsealing position,while the straight horizontal portions hold the cap in a predeterminedposition with respect to the mouth 0f the container. Since thehorizontal portions are denitely spaced from the mouth or rim, the capwill be sealed with substantially the same tightness in every instance.Likewise, the liners will be compressed substantially the same amount inevery package, whereby the eective porosity of the liners I4 will beuniform. In this manner, the sealing means in every cap are responsiveto release the pressure Within the package at substantially the sameinternal pressure. For this reason, the effectiveness 'of the sealagainst pressure may be accurately controlled by varying the amount ofparaiiine applied to disc I4, or by increasing or decreasing thethickness of the disc. If continuous threads are utilized, the sameresult may be attained by .applying the caps with automatic machineryadapted to seal the caps with the same degree of tightness in everyinstance. It has also been found that the percentage of parafiine may bevaried within predetermined limits to control the pressures in thepackage.

In Fig. 3, a slightly different embodiment of the present invention isillustrated, wherein a closure cap is provided with suitable screwthreads I3 and a dome-shaped cover portion I8 which provides asubstantial air space above the disc I4. This space serves a two-foldpurpose, namely, it provides an air space into which pressure may betemporarily discharged through the disc and also permits the liners toiiex or bulge upwardly when excessive pressures are created within thepackage. The latter result is particularly desirable, since it permitsthe liners to flex without exing the cap, whereby the annular zone I1 ofthe cover portion remains in sealed position to hold the imperviousliner II against the rim of the container. Another advantage is thatwhen the disc I4 iiexes upwardly, it is slightly stretched or expanded,whereby the porosity is increased to permit the pressure to be relievedmore rapidly.

In Fig. 4, a slightly different embodiment is shown, wherein a suitableaperture 20 is provided in the disc I4. Preferably, aperture 20 issubstantially in alignment with the aperture I2 of the liner II, wherebypressure within the package may pass directly into the middle of thedisc I4 and then outwardly therethrough to the outer edges, asillustrated by the arrows. The above construction may be utilized witheither a cap having a flat cover portion or a cap having a dome-shapedcover portion, as shown in Fig. 3. If desired, the aperture 20 may bespaced to the side of aperture I2 or a plurality of spaced apertures maybe provided to facilitate relief of pressure through the liner I4.However, a single aperture has been found to give excellent results.'I'he paraine forms a surface coating which forces the gases to passthrough the middle of the disc I4 and substantially prohibits passagethrough the surface thereof.

'I'he above described devices are preferably made by utilizing standardtypes of closure caps which can be made with existing machinery. Theliners II and discs I4 are preferably cut from rolls of the desiredmaterial by automatic machinery which, at the same time, may provide theapertures I2 and apertures 20. The cardboard material for the disc I4may be subjected to a bath of parafiine prior to or at the cutting ofthe discs, until it has absorbed substantially ve to fifteen per cent ofparaiiine. The liners II and I4 may 'be placed in the cap 4 by thecutting machinery or by hand to aspervious liner Il against the rim ofthe container through the intermediation of the resilient disc I 4. Thedisc I4 is compressed at the sealing zone to hold the liner Il firmly inposition and to provide a secure seal. Any pressure created within thecontainer by decomposition of the products is relieved by passingthrough the aperture I2 in liner Il and then through the middle of thedisc I4, as illustrated more particularly in Fig. 2.

It will be seen that the present invention provides a simple inexpensiveclosure which will vent a packageat a desired pressure withoutirnpairing the effectiveness of the seal against external moisture. Thecap may be manufactured by existing machines and may be made of metal ormoldable material such as plastics. These caps may be provided eitherwith interrupted or continuous thread engaging means adapted to engagecorresponding means upon a container. The liners can be provided withapertures without increasing the cost of the Vclosure and are made fromany desirable material adapted to accomplish the labove describedresults. The simplicity of the closure kfor achieving these results is afeature of the vinvention.

As various changes may be made in the form, construction and arrangementof parts herein without departing from the spirit and scope of theinvention and without sacrificing its advantages, it is to be understoodthat all matter herein is to be interpreted as illustrative and not in alimiting sense.

Having thus described my invention, I claim:

1. As an article of manufacture, a closure cap comprising a coverportion, a depending skirt, a relatively porous liner provided with yacoating of parailine, and a non-porous liner substantially bonded tosaid first liner having an aperture therein.

2,. As an article of manufacture, a closure cap comprising, incombination, a cover portion, a depending skirt, a liner adjacent tosaid cover portion formed of compressible material such as cardboard andthe like having a coating of parailine thereon, and an cil paper lineradjacent to said first liner having an aperture therem.

3..As an article of manufacture, a closure cap comprising, incombination, a depending skirt having container engaging means therein,a compressible liner partially saturated with parailne adjacent to saidcover portion, and an impervious liner adjacent to and beneath said rstliner, said second liner having an aperture therein substantially at thecenter thereof.

`4. As an article of manufacture, a closure cap comprising, incombination, a dome-shaped cover portion, a depending skirt, acompressible liner partially saturated with parafne adapted to tagainstthe marginal portions of said cover portion, and an impervious lineradjacent to said rst liner having an aperture'thcrein.

5. As an article of manufacture, a closure cap '3. comprising, incombination, a'cover portion, a depending skirt, a substantially porouscompressible liner partially saturated with moisture resisting.material, and an impervious liner adjacent to said first liner having anaperture therein.

6. As an article of manufacture, a closure cap comprising, incombination, a cover portion and a depending skirt, a substantiallyporous liner having an aperture therein, and an impervious lineradjacent to said first liner having an aperture therein.

7. As an article of manufacture, the combination of a disc linerimpregnated with parafllne and an oil paper liner bonded to said discliner and having an aperture therein.

8. In a sealed package, the combination of a container having capengaging means thereon,

a closure cap having a cover y,portion and a depending skirt providedwith means adapted to engage said means on the container, arelativelyporous compressible liner partially saturated with moisture resistingmaterial, and an impervious liner substantially bonded to said firstliner having an aperture therein.

9. In a sealed package, the combination of a container having capengaging means thereon, a closure cap having a cover portion and adepending skirt provided with means adapted to engage said means on thecontainer, a relatively porous compressible liner impregnated withmoisture resisting material, and a second liner adjacent to said firstliner having an ap.- ertureV therein.

10. In a sealed package, the combination of a container having capengaging means thereon, a closure cap having a cover portion and a'depending skirt provided withn'ieans adapted to engage said means on thecontainer, a slightly porous vliner adjacent said cover portionvhaving..

an aperture therein, and an impervious liner adjacent to said firstliner adapted to seal the rim of the container, and having anaperturetherein adapted to relieve pressure within lthe container.

11. In a sealed package, the combination of a container having aplurality of interrupted cap engaging lugs Aor threads, said lugs beingprovided with an inclined surface adapted to draw a cap downwardly andva. horizontal Surface deiinitelyspaced with respect to the rim of thecontainer and adapted to hold the cap in a predetermined sealedposition, a closure cap having a cover portion and a depending skirtprovided with lugs adapted to engage said lugs on the container, acompressible liner adjacent to said cover portion adapted to permit thepassage of gases under pressure therethrough, and

a second liner adjacent to said rstliner having an aperture therein,said liners being compressed a predetermined amount by reason of thehorizontal portion of the lug on the container.

12. A sealed package, comprising a glass container, a closure cap sealedupon said container. said cap having a cover portion, a depending skirt,and a liner of pulp material having an aperture therein, said aperturebeing adapted to permit pressure within the container tobe released bypassing laterally -between the two surfaces of the liner.

13. As an article of manufacture, 'a closure cap comprising incombination, a cover portion, a dependingskirt, and a liner made of asubstantially porous material,` the two surfaces of said liner beingcoated with moisture resisting material, said liner having an aperturetherein to permit excess pressure in a package to be relieved bypermitting the gases to escape between said two surfaces.

14. As an article oi' manufacture, a liner comprising a compressiblesubstantially porous disc having its two sides coated with parafilne,and said liner having an aperture therein to ypermit pressure within apackage to be relieved by passing between the two sides of said liner.

15. As an article of manufacture, a closure cap comprising, incombination, a cover portion and a depending skirt provided with meansadapted to engage cooperating means on a container, a disc formed o1'slightly porous material adjacent said cover portion, and a disc formedof impervious material adjacent to said rst disc adapted to seal the rimof a container, and having an aperture therein adapted to relievepressure within the container.

16. As an article of manufacture, a closure cap having, in combination,an imperforate cover portion, a depending skirt provided with. meansadapted to engage cooperating means on a container for holding the capthereon, a compressible and slightly porous disc liner of pulp materialadjacent said cover portion, and an oil paper liner adjacent to said rstliner adapted to engage and form a seal on the rim of the container,said oil paper liner having an aperture therein adapted to relievepressure within the container.

17. As an article of manufacture, a closure cap comprising, incombination. a cover portion, a depending skirt, and a liner of pulpmaterial having its lower surface coated with moisture resistingmaterial, said liner having an aperture therein adapted to permitpressure to pass laterally between the surfaces ot the liner.

18. As an article of manufacture, a closure cap comprising a coverportion, and a depending skirt provided with means for engaging andholding the cap on a container, a disc formed of compressible porousmaterial adjacent said cover portion adapted to permit gases underpressure to leak therethrough and a second disc substantially thinnerthan said first disc, said second disc being made from a more effectivesealing material than said first disc and having an aperture thereinadapted to relieve pressure within acontainer.

19. As an article of manufacture, a closure cap comprising, incombination, a cover portion and a depending skirt provided with meansadapted to engage cooperating means on a container, a disc formed ofslightly porous material adjacent said cover portion, and a second discformed of impervious material adjacent to said first disc and bondedthereto adapted to seal the rim of a container, and said second dischaving an aperture therein adapted to relieve pressure within thecontainer.

MARION H. RANEY.

